| 1 | // SPDX-License-Identifier: GPL-2.0 |
|---|---|
| 2 | /* |
| 3 | * Copyright (C) 2022-2023 Loongson Technology Corporation Limited |
| 4 | */ |
| 5 | #include <linux/kernel.h> |
| 6 | #include <linux/ftrace.h> |
| 7 | |
| 8 | #include <asm/unwind.h> |
| 9 | |
| 10 | bool default_next_frame(struct unwind_state *state) |
| 11 | { |
| 12 | struct stack_info *info = &state->stack_info; |
| 13 | unsigned long addr; |
| 14 | |
| 15 | if (unwind_done(state)) |
| 16 | return false; |
| 17 | |
| 18 | do { |
| 19 | for (state->sp += sizeof(unsigned long); |
| 20 | state->sp < info->end; state->sp += sizeof(unsigned long)) { |
| 21 | addr = *(unsigned long *)(state->sp); |
| 22 | state->pc = unwind_graph_addr(state, addr, state->sp + 8); |
| 23 | if (__kernel_text_address(addr: state->pc)) |
| 24 | return true; |
| 25 | } |
| 26 | |
| 27 | state->sp = info->next_sp; |
| 28 | |
| 29 | } while (!get_stack_info(state->sp, state->task, info)); |
| 30 | |
| 31 | return false; |
| 32 | } |
| 33 |